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The last week of a month a car dealership sold 12 cars. A new sales pr

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The last week of a month a car dealership sold 12 cars. A new sales pr  [#permalink]

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New post 29 Jul 2019, 06:43
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Question Stats:

90% (00:59) correct 10% (01:13) wrong based on 21 sessions

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The last week of a month a car dealership sold 12 cars. A new sales promotion came out the first week of the next month and the sold 19 cars that week. What was the percent increase in sales from the last week of the previous month compared to the first week of the next month?

A. 58%
B. 119%
C. 158%
D. 175%
E. 200%

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The last week of a month a car dealership sold 12 cars. A new sales pr  [#permalink]

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New post 29 Jul 2019, 07:52
Bunuel wrote:
The last week of a month a car dealership sold 12 cars. A new sales promotion came out the first week of the next month and the sold 19 cars that week. What was the percent increase in sales from the last week of the previous month compared to the first week of the next month?

A. 58%
B. 119%
C. 158%
D. 175%
E. 200%


Given: The last week of a month a car dealership sold 12 cars. A new sales promotion came out the first week of the next month and the sold 19 cars that week.

Asked: What was the percent increase in sales from the last week of the previous month compared to the first week of the next month?

the percent increase in sales from the last week of the previous month compared to the first week of the next month = (19-12)/12 = 7/12 = (700/12) % = 58%


IMO A
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Re: The last week of a month a car dealership sold 12 cars. A new sales pr  [#permalink]

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New post 29 Jul 2019, 08:30
IMO A

The easiest way to solve this is estimation:

the difference in sales between the two weeks is 7, which is a little above 50% of 12 (sales of previous week). so our answer is near 50%
if you see the options only one option is near 50 and that is option A

so our answer is A.

If you want to solve it mathematically,

(19-12)/12 * 100

7/12 * 100 = 58.4% ~ 58
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Re: The last week of a month a car dealership sold 12 cars. A new sales pr  [#permalink]

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New post 29 Jul 2019, 09:11
Bunuel wrote:
The last week of a month a car dealership sold 12 cars. A new sales promotion came out the first week of the next month and the sold 19 cars that week. What was the percent increase in sales from the last week of the previous month compared to the first week of the next month?

A. 58%
B. 119%
C. 158%
D. 175%
E. 200%


Increase is 7 over 12. Which is little over 50%. And obviously not more than 100%. IMO A
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Re: The last week of a month a car dealership sold 12 cars. A new sales pr  [#permalink]

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New post 06 Aug 2019, 17:56
Bunuel wrote:
The last week of a month a car dealership sold 12 cars. A new sales promotion came out the first week of the next month and the sold 19 cars that week. What was the percent increase in sales from the last week of the previous month compared to the first week of the next month?

A. 58%
B. 119%
C. 158%
D. 175%
E. 200%


We use the percent increase formula: (New - Old)/Old x 100:

(19 - 12)/12 x 100 = 7/12 x 100 = 58%

Alternate Solution:

The increase is 19 - 12 = 7 cars. As the increase (7) is less than the number of cars we had in the beginning (12), the percent increase is going to be less than 100. There is only one answer choice which is less than 100, namely A.

Answer: A
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Re: The last week of a month a car dealership sold 12 cars. A new sales pr   [#permalink] 06 Aug 2019, 17:56
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